Currently, the [browser_overflowScroll.js uses a custom implementation for getting the tabs to overflow](https://searchfox.org/mozilla-central/rev/6d7704caae2a61b0101bdb67481a80af20376663/browser/base/content/test/tabs/browser_overflowScroll.js#10-44). With the addition of the shared overflowTabs function in Bug 1778450, we should update this test to used the shared implementation. **Note: we'll need to keep the left, right, isLeft, isRight, etc. block of variables intact.** We just need to swap out the overflowTabs logic for the function call.
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Currently, the [browser_overflowScroll.js uses a custom implementation for getting the tabs to overflow](https://searchfox.org/mozilla-central/rev/6d7704caae2a61b0101bdb67481a80af20376663/browser/base/content/test/tabs/browser_overflowScroll.js#10-44). ~~With the addition of the shared overflowTabs function in Bug 1778450, we should update this test to used the shared implementation.~~ The shared overflowTabs now lives in BrowserTestUtils, instead of shared-head.js **Note: we'll need to keep the left, right, isLeft, isRight, etc. block of variables intact.** We just need to swap out the overflowTabs logic for the function call.